appeal

bottle

care

clean

concept

conservation

dirt

dirty

disaster

disposal

dump

earth

eco

ecological

ecology

energy

environment

environmental

garbage

girl

global

globe

green

industry

junk

landfill

litter

mask

natural

nature

pile

planet

plastic

pollution

problem

protection

recycle

recycling

refuse

renewable

reuse

rubbish

save

trash

volunteer

warming

waste

woman

world

young